Barking drum



June 5, 1928. 1,672,300

B. BRANCH BARKING DRUM Filed Sept. 19, 1927 Ji (4 1s Patented une 5,192a v UNITED STATES PATENT OFFICE.

nun:- men, or rename, ONTARIO, CANADA. :aAnxnte manic.

Applipation fled September 19, 1927, Serial No. 830,459, and in CanadaIarch 24, 1987.

This invention relates to barker drums for removing the bark from logswhich are to be made up into paper pulp. Heretofore these drums havebeen constructedof bars and rings secured together by means of rivetsand bolts having their axes directed radially of the drum and havingtheir heads located within the interior of the drum, and my object is toprovide a drum of simple construction that will overcome the aboveobjectionable features.

I attain my object by provldmg mwardl directed lugs on rings by means ofwhici the drum is carried so that it may be rotated. The rings areconnected by means of longitudinal channel bars which are mountedbetween adjacent lugs on the rings. The flanges of the channel barsaredirected outwardly and a rivet or bolt is passed through each lug andthe flanges of ad acent bars in contact therewith. The constructions arehereinafter more fully described and are llustrated in the accompanyingdrawings in which:

Fig. 1 is a side elevation of a portion of an end section of my drum;

Fig. 2 a cross sectional detail of the drum; Fig. 3 a view similar toFig. 2 on a larger scale showing the means for secunng the bars to therin and v Fig. 4 a longitudinal sectional deta11 of the drum showing thebinding ring and dr1v1ng gear connected thereto in cross section.

In the drawings like letters of reference 86 indicate correspondingparts in the different figures.

The drum includes a plurallty of rm? A and a plurality of longitudinalchannel ars B wh1ch define the circumference of the 40 drum. The ringsare provided with radial lugs C which are directed inwardly betweenadjacent bars to space them from one another. The flanges b and b of thechannel bars are directed outwardly and are adapted to be receivedsnugly between adjacent lugs C to form a number of continuous bands ofmetal therewith around the drum. Rivets D passed through the lugs andthrough the flanges b and b of the adjacent channel bars in contact witheach lug secure the bars to the lugs. The axes of the rivets aredirected substantially circumferentially of the drum and substantiallyat right angles to the axis thereof. The outer ends of the flanges b andb engage shoulders 0' formed on the lugs C. From the above descriptionit is obvious the rivets.

that the rivets D merely hold the bars B in position on the lugs C andthat any stresses, caused by the logs striking the bars, are borne bythe shoulders or the lugs. In other words the hereinbefore describedarrangement for securing the bars to the rings substantially eliminatesany shearing stress on Further the rivets are so located that theycannot be struck by the logs tumbling around within the drum andtherefore {.hey will not be damaged nor loosened by the ogs.

The spaces E between the longitudinal bars form slots through which thedetached pieces of bark may discharge from the drum into the tank or thelike (not shown) wherein the drum is mounted. The drum is suitablysupported for rotation by rollers or pulleys (not shown) which engagethe ripheries of the rings A and is suite 1 driven by means of a pinion(not shownj meshed with a gear G secured by studs H to the side of oneof the rings A.

Any number of rings A may be used in accordance with the length of thedrum and the bars intermediate the rings may be connected in spacedrelationshi with one another by means of blocks fitted in the spaces Theblocks are connected by rlvets J to adjacent flanges b and b, the rivetsJ bein arranged in the same manner as the rivets It will be distinctlyunderstood that the term rings used throughout the claims is intended toinclude any members for supporting the longitudinal bars of abarker andfilial; the term rivets includes bolts and the e. What I claim is:

1. A barking drum comprising rings connected by longitudinal bars, therings being provided with lugs directed between adjacent bars.

2. A barking drum comprising rings; a plurality of longitudinal barsdefinin the circumference of the drum, the rings eing provided with lugsdirected inwardly between adjacent bars; and means for securing the barsto the lugs.

3. A barking drum comprising rings; a plurality of longitudinal bars;lugs carried by the rings; and rivets for securing the bars to the lugs,the said rivets having their axes directed substantiallycircumferentially of the drum and substantially at right angles to theaxis thereof.

4. A barking drum comprising a series of channel bars; binding ringsprovided with lugs directed inwardly between adjacent bars to space themfrom one another; and rivets for securing the bars to the lu s, the saidrivets having their axes directed substantially circumferentially of thedrum and substantially at right angles to the axes thereof.

5. A barking drum comprising rings; a

lurality of longitudinal channel bars defining the circumference of thedrum, the flanges of the channel bars being directed outwardly; lugscarried by the rings, the said'lugs being directed inwardly between theflanges of adjacent channel bars; and a rivet passed through each lugand the flanges adjacent thereto. I 6. A barking drum comprising rin s;a plurality of longitudinal channel bars efiiiing the circumference ofthe drum; lugs directed inwardly from the rings, the lu s being spacedfrom one another to receive a channel bar between adjacent lugs;shoulders formed on the lugs for limiting the outward-movement of thechannel bars; and

rivets for securing the channel bars to the lugs.

. A barking drum comprising rings connected by longitudinal bars, therings being provided with lugs directed between adjacent bars to spacethem from one another; and blocks interposed between adjacent barsintermediate theends thereof.

8. A barking drum comprising a series of channel bars; binding ringsprovided with lugs directed inwardly between adjacent bars to space themfrom one another; rivets BURL BRANCH.

